get wire brushes with long/extended handles that would work great. Kinda like chimney sweeps use but much smaller diameter. People that work on boilers have these tools...I used to have them. Goggle it and see what you find.

Also, you could fit Scotch pot scrubbers on the appropriately sized dowel rod and make a pass through....like cleaning a gun. I can even think of ways using an electric drill....but I digress....

Kevin

steel wool is a bad idea because of all the VERY rustable bits it leaves behind.....even using compressed air, they seem to linger wherever they can. No on the WD-40.  You could rig a 'swab' to coat the inside. I'm thinking auto paint clear....or maybe the sealer they use on tile/grout? They even have plastic sealers which might work....I would think their lubricity perfect for dirt & air.

I could use an extra wand for my as-of-yet unrestored Anniversary model PN2. The wand at the top where you insert your hose tool, has a broken friction ring and non-existent Teflon ring. Those are riveted in there and I haven't taken that puppy on yet. Probably easier just to find another wand.

Kevin

Tyler! I sent you an email....hopefully we can trade something because I'm 'accumulating'  parts I'll probably never use.  I'd rather them go to a member than epay.

Kevin